A company I want to order shirts from and apply my design that needs a transparent background tells me the file requirement for my design is: cmyk, 300dpi, and .png This is all well and good except CS3 won't allow me to save from cmyk to png. When you click save as png is not an option in the drop down box. Any solutions to this problem?

I talked with the company today and was told the information was wrong on their website so my temper tantrum at 2am was justified, but not justiied at adobe. All fixed now and I'm happy. Thank you for your time.